#include<stdio.h>
int main()
{
	float m,n;
	char c;
	scanf("%f%c%f",&m,&c,&n);
	switch(c)
	{
		case '+':printf("%f\n",m+n);break;
		case '-':printf("%f\n",m-n);break;
		case '*':printf("%f\n",m*n);break;
		case '/':printf("%f\n",m/n);break;
		default:printf("your enter is wrong\n");break;
	}
	return 0;
}
